Where the hell has the Legend of Korra statue Mondo announced lat year?

Keep in mind, the Diamond booth display is not the same as individual company displays. The space available to each company is usually limited, so they likely won't have a full selection of what's to come. It's just a way for companies to have some presence there without springing for a full booth.

Fair enough, it's just they announced that thing at SDCC last year and not a word since.

Mondo isn't quick with releases. They really spread that stuff out and tinker with stuff right up to release. They aren't a big company like Hasbro or DST, where they can just throw releases out in big chunks of solicitations.